3-93.3.2 GroundingGrounding to prevent noiseUnder normal conditions, the inherent noise resistance is sufficient. However, in situations of excessivenoise, ground the instrument to increase noise suppression.Use an exclusive ground- For grounding purpose, use wiring with a minimum of 2 mm2 . The grounding connection should have aresistance of less than100Ω.- The point of grounding should be as close to the FP-e unit as possible. The ground wire should be asshort as possible.- If two devices share a single ground point, it may produce an adverse effect. Be sure to use an exclusiveground for each device.Note: Depending on the surroundings in which the FP-e unit is used, grounding may causeproblems.Example: The power supply line of the FP-e unit is connected to the function earth through a varistor. Ifthere is an irregular potential between the power supply line and the earth, the varistor maybe shortened.Do not ground an FP-e function earth terminal when grounding a plus (+) terminal of the powerThe FP-e tool port shielding and function earth terminal are connected.In some computers, the SG terminal of RS232C port and connector shielding are connected.When the FP-e is connected to a computer with a plus (+) terminal grounded, therefore, an FP-e’s minus (-)terminal is connected with the function earth terminal. As a result, short circuit occurs which may lead to thebreakage of FP-e and its neighboring parts.Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
